CN212676466U - Glass steel omnidirectional antenna - Google Patents

Abstract

The utility model provides a glass fiber reinforced plastic omnidirectional antenna, which comprises a transmission feed tube and an antenna array tube; the antenna array tube is sleeved at one end of the transmission feed tube, and the other end of the antenna array tube is connected with a 50 omega coaxial interface; a coaxial feed tube is arranged in the transmission feed tube; a plurality of offset vibrators connected in a sequential feed manner are arranged in the antenna array tube, and the adjacent offset vibrators are arranged in a different-axis manner; the coaxial feed tube is electrically connected with the bias oscillator; and the transmission medium in the bias oscillator is an air medium. The glass fiber reinforced plastic omnidirectional antenna expands the application frequency range of the coaxial crossed oscillator, can realize broadband omnidirectional radiation, ensures that a directional diagram of the antenna keeps unchanged basically in a wider frequency range, and has the characteristics of high efficiency, stable and reliable performance, low cost, remarkable high-power capacity and the like. The glass fiber reinforced plastic omnidirectional antenna overcomes the defect that the conventional cable coaxial crossed dipole antenna cannot meet the high-power capacity.

Description

Glass steel omnidirectional antenna

Technical Field

The utility model relates to an antenna technology field especially relates to a glass steel omnidirectional antenna.

Background

At present, the common technologies of omnidirectional antennas widely used in communication systems are all coaxial cross-feed oscillator modes, and usually adopt a series-feed or center-feed structural form, and the basic components of the omnidirectional antenna are a section of coaxial line with a length of about λ g/2 polyethylene material, and a core wire and an outer conductor are connected end to realize the effect of array radiation. However, under the influence of informatization and intelligentization wave, the capacity requirements of the cluster communication fields such as the subway station public security industry, the emergency communication industry, the airport industry and the like are continuously increased day by day, the frequency bandwidth and the power capacity are improved, and the inherent antenna bearing power capacity cannot meet the requirements of drastic change. Sometimes, to achieve antenna performance while saving cost, the cross-sectional size of the cable is reduced, resulting in a smaller power capacity; so that the inherent antenna can only withstand a transmission power capacity of 50-100W, if the transverse dimension of the cable approaches lambdag/4 or even greater, the radiation caused by the transverse electric field is not negligible, causing pattern disorder and gain reduction; when larger in size, even higher order modes are generated, which also perturbs the pattern and increases the cost of the antenna.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a glass steel omnidirectional antenna, this antenna have expanded the application frequency range of coaxial alternately oscillator, can realize the omnidirectional radiation of broadband, guarantee that the antenna keeps the directional diagram basically unchangeable in the frequency range of broad, and simultaneously, this antenna has characteristics such as efficient, the stable performance is reliable, with low costs and the high-power capacity that is showing.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a glass fiber reinforced plastic omnidirectional antenna comprises a transmission feed tube and an antenna array tube; the antenna array tube is sleeved at one end of the transmission feed tube, and the other end of the antenna array tube is connected with a 50 omega coaxial interface; a coaxial feed tube is arranged in the transmission feed tube; a plurality of offset vibrators connected in a sequential feed manner are arranged in the antenna array tube, and the adjacent offset vibrators are arranged in a different-axis manner; the coaxial feed tube is electrically connected with the bias oscillator; and the transmission medium in the bias oscillator is an air medium.

As the utility model provides a preferred embodiment of glass steel omnidirectional antenna, lambda g 4 choke pipe has been cup jointed on coaxial feeder tube surface.

As the utility model provides a glass steel omnidirectional antenna's a preferred embodiment, still include fixed strip and adapter sleeve, the fixed strip cup joints coaxial feed pipe surface of outside of tubes, lambda g 4 choke pipe cup joints on the fixed strip, adapter sleeve one end cup joints coaxial feed pipe surface of tubes, the other end passes through threaded connection and is in lambda g 4 choke pipe inner wall.

As a preferred embodiment of the glass steel omnidirectional antenna, still include the antenna bottom, its connects through insulating subassembly the transmission feed pipe is close to the one end of 50 omega coaxial interface.

As the utility model provides a glass steel omnidirectional antenna's a preferred embodiment, the biasing oscillator includes the oscillator pipe and establishes oscillator heart yearn in the oscillator pipe.

As the utility model provides a preferred embodiment of glass steel omnidirectional antenna, the oscillator pipe both ends are equipped with the dead ring, the oscillator heart yearn passes the dead ring extends the oscillator pipe.

As a preferred embodiment of the glass fiber reinforced plastic omnidirectional antenna provided in the present invention, the coaxial feed tube includes a transmission tube and an inner conductor disposed in the transmission tube.

As the utility model provides a preferred implementation mode of glass steel omnidirectional antenna, adjacent connect through the soldering between the biasing oscillator.

As the utility model provides a glass steel omnidirectional antenna's a preferred embodiment, the biasing oscillator is fixed and the cover is inside the glass steel dustcoat with the supporting glue.

As the utility model provides a glass steel omnidirectional antenna's a preferred embodiment, choke pipe sets up coaxial feed pipe is close to the one end of biasing oscillator.

The utility model discloses following beneficial effect has:

the utility model provides a glass steel omnidirectional antenna has expanded the applied frequency range of coaxial alternately oscillator, can realize the omnidirectional radiation of broadband, guarantees that the antenna keeps the directional diagram basically unchangeable in the frequency range of broad, and simultaneously, this antenna has efficient, and the stable performance is reliable, characteristics such as the high-power capacity with low costs and showing. The glass fiber reinforced plastic omnidirectional antenna overcomes the defect that the conventional coaxial feed tube cross feed oscillator antenna cannot meet the high-power capacity. The utility model provides a glass steel omnidirectional antenna also saves the antenna cost simultaneously, realizes and satisfy electrical property index and radiation performance index and satisfy high-power capacity when realizing the wide band of frequency, the utility model discloses high-power broadband omnidirectional antenna is applicable to communication systems such as subway public security cluster communication system and airport communication ground service dispatch communication system.

Drawings

Fig. 1 is a schematic structural diagram of a glass fiber reinforced plastic omnidirectional antenna of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.

In the figure, 100-transmission feed tube, 121-transmission tube, 122-inner conductor, 130-standing wave regulator, 141-lambdag/4 choke tube, 142-fixed strip, 143-connecting sleeve, 200-antenna array tube, 210-glass fiber reinforced plastic outer cover, 220-bias oscillator, 221-oscillator tube, 222-oscillator core wire, 223-insulating ring, 230-supporting glue, 110-metal sleeve, 120-coaxial feed tube, 300-50 omega coaxial interface, 400-antenna bottom cover, 500-insulating component, 510-insulating cavity, 520-insulating locking piece and 600-glass fiber reinforced plastic.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Referring to fig. 1-3, the present embodiment provides a glass fiber reinforced plastic omnidirectional antenna, which includes a transmission feed tube 100 and an antenna array tube 200; the transmission medium inside the bias oscillator 220 in the antenna array tube 200 is an air medium.

The antenna array tube 200 is sleeved on one end of the transmission feed tube 100. Specifically, the antenna array tube 200 includes a glass fiber reinforced plastic housing 210 and a plurality of offset oscillators 220 arranged in the glass fiber reinforced plastic housing 210 and sequentially connected by feeding, adjacent offset oscillators 220 are arranged in a different axis, and the adjacent offset oscillators 220 are connected by soldering to realize feeding connection. It is understood that none of the adjacent bias elements 220 are coaxial and the spaced bias elements 220 are coaxial. Each bias oscillator 220 comprises an oscillator tube 221 and an oscillator core wire 222 positioned in the oscillator tube 221, the oscillator core wire 222 is coaxial with the oscillator tube 221, and two ends of the oscillator core wire 222 extend out of the oscillator tube 221. Preferably, the two ends of the oscillator tube 221 are provided with insulation rings 223, and the oscillator core wire 222 passes through the insulation rings 223 and extends out of the oscillator tube 221.

Further, the bias vibrator 220 is fixed by a support adhesive 230 and externally sleeved with the glass fiber reinforced plastic pipe housing 210, and in concrete implementation, a part of the bias vibrator 220 may be fixed by the support adhesive 230, or all the bias vibrators 220 may be fixed by the support adhesive 230, or the bias vibrators 220 at intervals may be fixed by the support adhesive 230.

The transmission feed tube 100 includes a metal sleeve 110 and a coaxial feed tube 120 disposed in the metal sleeve 110, wherein one end of the metal sleeve 110 is sleeved with the glass fiber reinforced plastic outer cover 210, and the other end is connected with a 50 Ω coaxial interface 300 (standard 50 Ω coaxial interface 300). Preferably, the metal sleeve 110 is encapsulated by the glass fiber reinforced plastic 600 to enhance the installation strength.

The coaxial feeding tube 120 includes a transmission tube 121 and an inner conductor 122 disposed inside the transmission tube 121, wherein one end of the inner conductor 122 extends out of the transmission tube 121 and is electrically connected to the adjacent bias vibrator 220 through a conductor, such as a standing wave adjuster 130.

The outer surface of the coaxial feed tube 120 is sleeved with a lambdag/4 choke tube 141, and specifically, the outer surface of one end of the transmission tube 121 close to the bias vibrator 220 is sleeved with the lambdag/4 choke tube 141. The omnidirectional antenna further comprises a fixing strip 142 and a connecting sleeve 143, the fixing strip 142 is fixedly connected to the outer surface of the transmission tube 121 in a sleeved mode, the lambdag/4 choke tube 141 is connected to the fixing strip 142 in a sleeved mode, one end of the connecting sleeve 143 is connected to the outer surface of the transmission tube 121 in a sleeved mode, and the other end of the connecting sleeve 143 is connected to the inner wall of the lambdag/4 choke tube 141 through threads.

Further, the omni directional antenna further includes an antenna bottom cover 400 connected to a side of the transmission feed pipe 100 near the 50 Ω coaxial interface 300 via an insulating member 500. Specifically, the insulation assembly 500 includes an insulation cavity 510 for fittingly carrying the antenna bottom cover 400 and an insulation locker 520 for fixing the antenna bottom cover 400 and the insulation cavity 510 to the metal sleeve 110. The antenna bottom cover 400 is provided with a connecting seat, so that the 50 Ω coaxial connector 300 is electrically connected to the inner conductor 122 of the coaxial feed tube 120 through the connecting seat.

It can be understood that the insulating locking member 520 includes an insulating sleeve, a screw and a nut, wherein the insulating sleeve is sleeved in a through hole formed in the antenna bottom cover 400 and the insulating cavity 510, and then is locked by the screw and the nut; it is also possible that the insulative locking member 520 includes a screw and a nut made of an insulative plastic member.

In the prior art, the design of the conventional half-wave dipole unit is basically a symmetrical structure, the feeding mode is mostly that the coaxial feeding tube 120 performs choking and radiation by grounding with the circular axis of the radiating dipole unit, and medium filling needs to be performed inside the sleeve dipole in order to reduce the size of the antenna. When the antenna product is used for the multi-unit array to be a high-gain antenna, multi-stage impedance transformation and switching are required to be carried out inside the sleeve oscillator. Although this feeding method can be well matched, it will make the switching feeding point very complicated. When the equipment promotes and applies transmitting power to the antenna product, the current is too concentrated when the large current flows through the multistage feeding point, a large amount of heat can not be dispersed, and then the feeding welding point and the filling medium are melted, and the antenna fails. The utility model discloses a research and development novel different axle edge biasing feed technique solves above technical difficulty. The novel off-axis edge offset feed technology gets rid of the characteristic that the conventional radiation oscillator must be coaxial with the coaxial feed tube 120, innovatively uses off-axis offset radiation unit design, two-stage radiation units (namely adjacent offset oscillators 220) are two axes, a multistage array is formed by extending the two axes in a staggered manner, two air medium connection feed rods are arranged between the axes by calculating impedance difference between the two axes, the two radiation units are in feed connection with each other at the edges, and the technical problem that the conventional half-wave symmetrical oscillator structure needs to carry out multistage impedance conversion to cause too many feed points and cannot effectively radiate heat is solved.

In the prior art, the conventional half-wave oscillator unit is basically internally filled with a medium for debugging due to the limitation of space size. Although the size is reduced, the temperature which can be endured by the filled medium is generally 50-150 ℃, and the power bearing tolerance of the concentric and coaxial design is generally poor. And the utility model discloses just rely on different axle edge offset feed technique to this condition for the prerequisite to develop the air medium power dispersion technique of matching, rely on the radiating element of the non-coaxial characteristic design air medium of the radiating element of different axle offset (namely the offset oscillator 220 of antenna array tube 200), increase the fluid area of air medium radiating element electric current, use coaxial feed tube 120 to carry out the direct current ground connection design at antenna array radiating element's end, even make the antenna product produce in the use in the twinkling of an eye the characteristic that also can utilize air medium after the power extremely fast increases on each array radiating element of power homodisperse, and then greatly promote the effective heat dissipation of antenna product, make antenna product effective load power reach 500W's level.

The utility model provides a glass steel omnidirectional antenna adopts the high-power omnidirectional antenna oscillator structure technique of the different axle edge biasing feed of air dielectric transmission formula, mainly is applied to trunking communication technical field. The antenna has transverse radiation characteristics, in the longitudinal array structure of the antenna units, antenna gain in the transverse direction depends on the number of the oscillator units, and different numbers of the bias oscillators 220 can be combined to achieve gain of 6-11 dBi.

In order to solve the interference phenomenon of the noise floor of the transmitter and the receiver of the antenna in practical use, the discrete current is eliminated by adding the insulation component 500 between the antenna bottom cover 400 and the metal sleeve 110 to isolate the current incompletely radiated from the antenna.

The cross transposition feed structure antenna of traditional 50 omega coaxial feeder pipe feed uses its frequency bandwidth also narrower when the UHF frequency channel, only less than 2% -4% impedance bandwidth and antenna pattern bandwidth, and the utility model discloses the structure is innovative at conventional frequency impedance bandwidth, simultaneously, also has increased the high-power capacity that bears of antenna through utilizing this kind of transmission characteristic of air medium, can realize satisfying its frequency bandwidth can reach 10% impedance bandwidth when the UHF frequency channel, simultaneously, the cross transposition feed structure antenna of traditional 50 omega coaxial feeder pipe feed is in the in-service use in-process, and antenna power can only satisfy to the biggest within 50-100W, and the utility model discloses the antenna power of structure innovation then can bear 500W high-power capacity, has also saved the assemble duration of antenna in process of production when this innovation.

The utility model provides a glass steel omnidirectional antenna also saves the antenna cost simultaneously, can realize that the frequency bandwidth realizes electrical property index and radiation performance index simultaneously and satisfies high-power capacity, the utility model discloses high-power broadband omnidirectional antenna is applicable to trunking communication system and airport communication system communication. The utility model discloses an adopt common brass pipe as metal sleeve 110, and conventional glass steel dustcoat 210, complete accessible machine tooling shaping, electrical property and radiation performance uniformity are good, and processing technology is simple, is favorable to batch processing production.

The utility model discloses omnidirectional antenna's main technical indicator as follows:

1. frequency range: 806-866 MHz;

2. frequency bandwidth: 60 MHz;

3. gain: 11 dBi;

4. horizontal plane lobe width: 360 degrees;

5. vertical plane lobe width: 7;

6. voltage standing wave ratio: less than or equal to 1.5;

7. power: 500W;

8. polarization mode: vertically polarizing;

9. the third-order passive intermodulation (2 multiplied by 43dBm carrier wave) is less than or equal to-150 dBc.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (10)

1. A glass fiber reinforced plastic omnidirectional antenna is characterized by comprising a transmission feed tube and an antenna array tube; the antenna array tube is sleeved at one end of the transmission feed tube, and the other end of the antenna array tube is connected with a 50 omega coaxial interface; a coaxial feed tube is arranged in the transmission feed tube; a plurality of offset vibrators connected in a sequential feed manner are arranged in the antenna array tube, and the adjacent offset vibrators are arranged in a different-axis manner; the coaxial feed tube is electrically connected with the bias oscillator; and the transmission medium in the bias oscillator is an air medium.

2. The frp omnidirectional antenna of claim 1, wherein a λ g/4 choke is sleeved on a surface of the coaxial feed tube.

3. The glass reinforced plastic omnidirectional antenna of claim 2, further comprising a fixing strip and a connecting sleeve, wherein the fixing strip is sleeved on the outer surface of the coaxial feed pipe, the λ g/4 choke pipe is sleeved on the fixing strip, one end of the connecting sleeve is sleeved on the outer surface of the coaxial feed pipe, and the other end of the connecting sleeve is connected to the inner wall of the λ g/4 choke pipe through threads.

4. The glass reinforced plastic omnidirectional antenna of claim 2, comprising an antenna bottom cover connected to a side of the transmission feed tube near the 50 Ω coaxial interface via an insulating assembly.

5. The glass reinforced plastic omnidirectional antenna of claim 1 or 2, wherein the offset oscillator comprises an oscillator tube and an oscillator core wire arranged in the oscillator tube.

6. The glass reinforced plastic omnidirectional antenna of claim 5, wherein insulation rings are arranged at two ends of the oscillator tube, and the oscillator core wire passes through the insulation rings and extends out of the oscillator tube.

7. The glass reinforced plastic omnidirectional antenna of claim 6, wherein the coaxial feed tube comprises a transmission tube and an inner conductor disposed within the transmission tube.

8. The glass reinforced plastic omnidirectional antenna of claim 1, wherein adjacent offset elements are connected by soldering.

9. The glass reinforced plastic omnidirectional antenna of claim 1, wherein the offset vibrator is fixed inside the glass reinforced plastic housing with a support glue.

10. The glass reinforced plastic omnidirectional antenna of claim 2, wherein the λ g/4 choke is disposed at an end of the coaxial feed tube near the bias element.

Images